Grease applying machine for greasing bun pans and the like at spaced points for providing uniform layers



Nov. 4, 1952 2,616,390

K. J. @(LINCK GREASE APPLYING MAHINE FOR GREASING BUN FANS AND THE LIKE AT SPACED POINTS FOR PROVIDING UNIFORM LAYERS v Filed Aug. 29, 1950 Bread. ]L

Bun Pan.

INVENTOR. Emu Jf/L nvcn BY 7mm, 0* 9% A rroe/vzrs.

Patented Nov. 4, 1952 GREASE PPLYING MACHINEjFORGREAS-j 'ING-BUNPANS AND THE-LIKE AT sPAc n POINTS FOR PROVIDING. UNIFORM- LAYERS Karl J. Klinck, San Gabriel, Calif. Application August 29, 1950; Serial'No. 1855066 2 Claims. (01. 1 1'8 2}) 1 An objectoffmy invention is to provide -a grea'se applyingmachine' for greasing-bun pans and tlie likeat; spaced pointsfor providing a uniform layer "The machine has automatic means for delivering only the desired quantity of grease or'oil to the pan when the pan is in position and then the nozzle will beshut oil until the next pan is brought into proper registration with the nozzle; The-pans themselvesactuate the mechanism that opens the nozzle for a predetermined length of time-for each actuation.

The machine shown in my copending application can take care of the automatic greasing of bread pans and I have found that it can be adapted to grease automatically, large bun pans and-the like where the tripping mechanism actua-ted bythe pan, is held continuously in operative positionas the entire pan passes through the machine. If the nozzle is maintained in open positionduring the entire travel of the bun pan past the nozzle, too much grease is applied to the pan with the result that the dough in thepan would be fried when the pan is placed in the oven rather than baked. Furthermore, there would be an-unnecessary consumption of grease.

The principal object of my invention is to adapt the-bread pan greasing; machine shown in my copending application tothegreasing of bun pans aswell as multiple bread pans. The machine will move the bun pans at a continuous and uniform speedunder the nozzle and I provide novel means for' causing the nozzle to open periodically to spray grease onto the pan and then to close after a predetermined quantity of grease has thus been sprayed. The amount of grease delivered for each injection canbevaried and the time interval between each injection can also be varied by the operator.

Other objects and advantages will appear in the-following specification, and the novel features of the device will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawing forming a part of this application, in which:

Figure 1 is a schematic view of the essential parts of the machine and I illustrate a wiring diagram arranged for greasing multiple" bread pans;

. Figure 2 isaaxsimilarview with the'w'iringtdia gram arranged"iorggreasing burrp'ans;

While I have; shown only the .preferredxform of my .invention, it should: be. llndfilStOOddflIfiti various; changesor modifications maybe made, withinxthescop'e of the appended claims without departing; from: the spirit. and scopeof: the-:i-ri-i-' vention.

Inasmuch aslmy. present inventionmakes use of. all of the mechanism in my, copending case;- I- wishtthe disclosure of the copendingcaseto be the disclosure of the. present one.- The wi'ringidiiigram and schematic showing of. certainpartsin Figure. 7,011 the copendinglcase; form then-basis for Figures. 1 and 2 .of. the present case.. LThe wiring .diagrama'ndelectricallequipmentha's been altered so :that' the machine canha'ndlemultiple bread pansor large bun pans.

'It-Lmight bet best .to'describe the-electrical-equ ip men-t firstiand then. show-how themachineean grease multiple bread pan's or bu'n pansw ith such equipment. 1 A magnetic dela'y r'elay isillustrated diagrammatically at L' in both Figures 2. Both figures show the same'p'ar'ts. T-he ference I is that: in- Figure the electrical-p are adjusted for the automatic gr'easing---of inul'ti-- ple br'eadI-pans while i-n F'igure 2, the-same parts"- are adjusted for :the. automatic greasing of b'iin' pans. Thelieavy: lined wiring in Figure-I traces the electrical circuits used when the-maoh ine greases multiplebread pa'nsa The li'gliter lined wiring in Figure- 1 is used-When the-machine greases bun pans;

The magnetic delay relay-L' iii-Figure 1; incll'lds' asolenoid I 0| that when energized, -controls tlie the left-in-Figure 1, contacts I00 and III'I wi -llnb e' closed while contacts I08 and I09. will bejmoved' out of engagement with their associate contacts I I0 andl I I, respectively. When thecontacts I06 and I0? of the switch 'M are closed, the electrical" mechanism will be set forcausingithemachine to' grease multiple bread'pans.

Before describing the electrical circuits for the greasing of .the multiple bread pans, it is: bestto' describe the basic parts of the bread pan, greasing. machine shown schematically inbothFigures l and 2. As already stated, the entire machine disclosed in my copending application is madeapart of this case andonly' thoseparts are ill us trated my-presentcase which will go toward a complete understanding of howthe machine can be used for greasingbun pans as well as multiple bread pans.

A tank K is indicated in Figure 1 and this tank contains the grease or oil which is to be used for greasing the pans. A motorF is operatively connected to an oil or grease pump E and causes the under pressure to an oil nozzle J. A return oil' pipe 54 leads from the valve V to a pressure relief valve 55 and thence to the tank K. Any excess oil not used by th nozzle J is returned to the tank K in this manner.

A plurality of bread pans 33 are connected together by bars 34 and are moved as a unit by an endless conveyor B under the nozzle J. The motor F is operatively connected to the conveyor 13 and causes it to move continuously as soon as a main switch 65 is closed. A trip lever 51 is pivoted at 58 and is connected to a switch. 6| so that each time a bread pan 33 trips the lever 51, the switch 6| will be closed. When this occurs, the bread pan that trips the lever 51 will be disposed directly under the nozzle J and the electrically controlled mechanism will cause oil to issue from the nozzle to grease the pan. The oil nozzle will remain open for one fifth of a second or for any other desired predetermined time interval and then will automatically close even'though the trip lever 51 still engages the bread pan. In this way only a given quantity of oil or grease will be sprayed onto the interior of the pan.. As soonas the pan clears the lever 51, a spring 64 will swing the lever 51 to open the switch 6 I. The parts are now ready to grease the next pan 33 as soon as it trips the lever 57.

The motor F is a three phase one and the main switch 65 when closed, connects it to a source of a three phase alternating current at 220 volts. I do not wish to be confined to any particular type of motor or source of electricity. In the operation of my device for greasing multiple bread pans, the closing of the main switch 55 starts the motor F and causes the upper reach of the endless conveyor B to move in the direction of the arrow a. handle I05 of the master control switch from the neutral N position into the one where it will point to the words Bread pan. He then places a multiple bread pan 33 on the conveyor and Figure 1' shows the first pan in the group about to depress the trip lever 57. When this is done, the

oil nozzle J will be positioned above the pan. The actuation of the lever 51 by the pan will close the switch GI and the following electric circuits will be closed:

The solenoid I M of the magnetic delay relay will be energized by a current flowing along wire II 2, Figure 1, wire II3, the closed contacts I06 andfl'l of the master control switch M, wire I I4, solenoid IOI, wire II5, the closed switch wire H6, and to the return wire Ill. The energizing of the solenoid l0I will close switches I03 and I04 that in turn close a circuit to the magneticv or solenoid controlled valve V. Current will flow from the wire II2 to a wire I I8 that leads to the closed switch I03, and a wire II9 carries the current to the other closed switch I04, and from there the current will flow along a wire I 20 to the magnetic or solenoid operated valve V, and thence along a wire I2 I to the return wire H1. The current will operate the valve V to open the nozzle J and spray oil or grease into the pan 33. The switch I04 is a timed micro switch and it The operator throws the is setto open one fifth of a second after it is closed. The opening of the switch I04 causes the electric circuit through the valve V to be broken and the valve will close the nozzle J.

I As soon as the next bread pan 33 is moved against the trip lever 51 by the upper reach of the conveyor B, the switch 6| will again be closed and the same two electric circuits will also be closed, one of these circuits energizing the solenoid IOI to close the time-controlled switch I04 and the other circuit being completed by the closing of the switch I04 and the energizing of the magnetic valve V for opening the nozzle J and causing the latter to spray the second bread pan with a predetermined amount of grease before the nozzle is shut ofi. This operation is repeated for every bread pan 33 that is moved through the machine.

When it is desired to grease bun pans I22 shown in Figure 2, the master control switch M is swung from the bread pan position shown in Figure 1 into the bun pan position shown in Figure 2. The contacts I06 and I0! will be separated, while the contacts I08 and III) will be brought into engagement with each other and also the contact I09 with the contact III. The throwing of the switch M into this new position sets up an initial closed circuit to a demagnetized delay relay LI. The switch I02 in the magnetized delay relay L is normally closed, and therefore a current will flow from wire II2 through wire I23, switch I02 and wire I24, solenoid I25, wire I25, switch contacts I09 and III, and to the return wire I I1. The solenoid I25 is therefore energized and will close the time-controlled micro switch The switch I2! is of such a type as to re- I2-I. main closed so long as the solenoid I25 isenergized and to remain closed a predetermined time interval after the solenoid is deenergized. The time interval can be regulated.

The device is now ready to grease a bun pan I22 with a plurality of injections of grease that are made at spaced intervals. This istrue even though the bun pan holds the trip lever 51- in active position to keep the switch 6I closed until the entire length of the bun pan passes by the lever. From actual practice I have found that the nozzle J should remain open for approximately one-fifth of a second and the spray of grease will cover about nine inches of the bread pan area. The nozzle J is then closed and remains closed while the bun pan is moved to bring a new section into registration with the nozzle. The elapsed time to accomplish this movement of the bun pan is approximately onefifth of a second. The valve V will then open the nozzle J a second time to cause it to spray grease over the next area of the pan. The means for accomplishing this will be now explained. It is best to have the sprayed areas overlap each other slightly. In a bun pan that is twentyseven inches long, the nozzle will be opened about three times and the pan will be moved so that the sprays of grease will be delivered to the pan at three different points. The entire area of the pan will be covered. The intermittent spraying of the bun pan limits the quantity of the grease sprayed onto the pan, and therefore a saving in grease will result.

Again referring to Figure 2, it will'be notedcause an electric current to flow from wire II2 through the closed switch I21 and thence along a wire I20 to a closed switch formed by the contacts I08 and H0, and thence along a wire I29 to the wire H4 and the solenoid IOI. From here the current will flow through the wire H5, the closed switch BI and will pass along the wire II6 back to the return wire II1, thus completing the circuit. The solenoid IOI will 'be energized and will open the switch I02 while closing switches I03 and I04.

The closing of the time-controlled switch I04 will cause a circuit to flow to the valve V by means of the wire I I 8, the closed switch I03, wire II9, the time-controlled switch I04, wire I20, valve V and the wire I2I back to the return wire H1. The energizing of the valve V opens .the nozzle J and a predetermined quantity of grease will be sprayed upon the initial portion of the bun pan. The switch I04 will open after predetermined time period such as one-fifth of a second and as soon as the switch opens, the current to the valve V is cut oif and the valve will close the nozzle J. The bun pan will be carried by the conveyor B to bring a new area into position to be sprayed with grease.

It will be remembered that the energizing of the solenoid IOI opens the switch I02, while at the same time closing switches I03 and I 04. The opening of the switch I02 cuts ofi the current to the solenoid I and since the switch I21 closed by the energizing of the solenoid is a time-controlled one, the switch will open after a predetermined time interval from the time the solenoid I25 is deenergized. The opening of the switch I21 stops the flow of current to the solenoid |0I because the switch is in series with the solenoid. As soon as the solenoid IN is deenergized the switch I02 will again be closed and this will reestablish the circuit to the solenoid I25 and energize it. The energizing of the solenoid I25 again closes the switch I21 which in turn closes the circuit to the solenoid IOI and causes this solenoid to be again energized and close the switches I03 and I04 while opening the switch I02. The closing of the time-controlled switch I04 results in an electric current again flowing through the valve V to open the nozzle J for one-fifth of a second or any other predetermined time interval, and thus the next portion of the bun pan is sprayed with grease.

This cycle of operation is repeated indefinitely so long as the switch GI remains closed by the trip lever 51 which in turn contacts the bun pan I22. The result is that the nozzle J is opened a number of times while the bun pan passes thereunder and sprays the desired quantity of grease onto the desired portions of the pan, this resulting in a uniform application of grease to the entire area of the pan. The time-controlled switch I04 determines the length of time the nozzle J remains opened while the time-controlled switch I21 determines the length of time between successive openings of the nozzle J. Both switches can be regulated to give the desired amount of grease for each opening of the nozzle and the desired length of time between openings so that pans of different areas will be uniformly greased over their entire surfaces.

After the entire bun pan has passed the trip lever 51, the spring 64 will return the lever to the position shown in Figure 2 and the switch SI will be opened. This will cause the solenoid IM to remain deenergized and the solenoid I25 to remain energized. The parts are now ready to grease the next bun pan. It will be seen that a simple swinging of the handle I05 of the master switch into the bread pan position or the bun pan position will change the device from opening the nozzle J one time for each bread pan 33 passing thereunder, to a plurality of times for each bun pan I22 passing thereunder.

I claim:

1. The combination with a conveyor for movi g a bun pan; and a spray nozzle connected with grease under pressure for greasing the pan; of work controlled and electrically actuated means for causing the nozzle to intermittently spray the pan at a number of points as the pan is moved by the conveyor and comprising a solenoid; a trip lever actuated by the pan for closing a switch for connecting a source of current with the solenoid for energizing the solenoid; an electric valve for the nozzle; 3, second timecontrolled switch closed by the solenoid when the latter is energized and connecting the electric valve with the source of current and causing the valve to open and permitting grease under pressure to issue from the nozzle and spray a predetermined area of the pan; said timecontrolled switch opening after a predetermined time interval and causing the valve to close; a second solenoid; a third switch closed when the first-mentioned solenoid is deenergized, said third switch connecting the second solenoid with the current source for energizing the second solenoid; a fourth time-controlled switch closed by the energizing of the second solenoid and being in series with the electric circuit to the first solenoid; the third switch being opened by the energizing of the first solenoid and deenergizing the second solenoid; the fourth switch being opened after a predetermined time period after the second solenoid is deenergized and cutting off the current to the first solenoid, whereby the deenergized first solenoid will again close the third switch and energize the second solenoid which will close the fourth switch and energize the first solenoid for again temporarily closing the second time-controlled switch and opening the valve 9. second time for spraying a consecutive portion of the pan; this sequence of operations being followed automatically so long as the trip lever is in contact with the pan.

2. In a pan-greasing apparatus of the character described: an injection nozzle adapted to deliver grease or the like to a baking pan; means for imparting relative movement between the nozzle and the pan to expose the latter for a greasing operation; actuating means for the nozzle to selectively actuate the latter for delivering either single or a succession of injections of grease to the pan during said relative movement; and manually-controlled adjusting means to adjust the actuating means for actuation of the nozzle in the selected manner.

KARL J. KLINCK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,885,453 Larson Nov. 1, 1932 2,345,076 Spencer Mar. 28, 1944 2,400,315 Paasche May 14, 1946 2,453,527 Mero Apr. 19, 1949 2,499,621 Archer Mar. '1, 1950 

